Roofing strip



Dec. 31, 1.929. M. L. CATON ROOFING STRIP Filed Aug. 28, 1924 mun -66;? 4%, MM

Patented Dec. 31, 1929' UNITED STATES PATENT OFFICE MAURICE I, CATON, OF QUEBEC, CANADA, ASSIGNOR TO THE BARRETT COMPANY, A CORPORATION OF NEW JERSEY ROOFING STRIP Application filed August 28, 1924. Serial No. 734,677.

This invention relates to a strip of roofing material or manufacured shingle which has a selvage edge or portion free from mineral wear-resisting material. By the present invention provision is made whereby water is less apt to creep or be blown over the edge of the strip or end of the shingle than is the case in the usual strips or shingles of this sort. The invention is especially applicable to roofin strips or shingles that are manufactured y saturating a base of so-called felt or fibrous material with waterproofing material such as asphalt, coating the surface thereof with plastic material such as asphalt for example, and then applying mineral wear-resisting material such as crushed stone, slate, etc., to the plastic material While it is still warm and in a soft or plastic condition. In strips or shingles of this sort, known in the trade as composition roofing, a selvage edge is often provided along one edge of the strip or one end of the shingle free from the mineral wear-resisting material. In the case of roofing strips, thestrips are installed upon a roof deck with the edge of one strip overlapping the selvage edge of another strip, and in case of shingles, the lower end of a shingle overlaps the upper end of an underlying shingle covering the portion that is free from wear-resisting material. If the overlapping portions happen to be separated there is danger of water creeping or being blown over the edge of the underlying strip or over the end of the underlying shingle and making its way inside the building.

By the present invention provision is made by which protection is afforded against the entry of water into a building and a roof can be more safely covered.

The invention will be understood from the description in connection with the accom panying drawings, in which Fig. 1 is a plan View of a roofing strip;

Fig. 2 is a end view of same;

Fig.3 is a plan view of a shingle; and

Fig. 4 is an edge of the same.

In the drawings, reference character 1 indicates a sheet of fibrous material or felt that is saturated with waterproofing materials and has applied to oneside thereof a coating 2 of plastic material upon which is placed a layer 3 of wear-resisting material such as crushed stone, slate, orthe like. The plastic material 2 extends over the entire side of the sheet 1 but the layer of wear-resisting material 3 terminates along the line 4 short of one edge of the strip. The selvage edge lying between the line 4 and the edge 5 of the strip is so treated that'one or more longitudinal ribs 6, preferably parallel to the edge 5, are provided. This may be done, for example, by corrugating the selvage edge by passing it between corrugated rollers or in any other convenient way. A properly shaped tool or instrument may easily be passed along the selvage edge while the plastic material 2 is still warm and, therefore, in its soft or plastic condition so that the plastic material will accumulate in lines so as to form the ribs 6 as indicated. If the selvage edges of the sheets are corrugated by passing the same between corrugated rolls, the felt itself may be slightly corrugated whereas if an instrument is passed along the surface of the plastic material 2 as indicated, the material will simply be raised along longitudinal lines to provide the ribs without effectin the felt base 1 itself. Or the ribs 6 may e produced by applying to 'the selvage edge an additional quantity of coating either of thesame or lower melting point by transfer Wheels or otherwise. If desired a portion of the plastic material on the top side of the selvage edge may be removed before applying the additional coating material.

When the roofing stri s are installed upon a roof Withthe edge 0 another sheet overlapping the selvage edge of the first laid sheet, the ribs 6 hinder the water from passing off of the wear-resisting material along the line 4 so as to reach the edge 5 thereby protecting the roof against leakage. This result will be accomplished regardless of whether the roofing strips are installed horizontally across provide crosswise extending ribs 12 for a purpose similar tothat above described in connection with Figs. 1 and 2, and it is thought unnecessary to describe the same more in detail.

s In the claim it will be obvious that the term strip or strip of composition roofing material is intended to include either roll roofing, namely, strips or roofing of considerable length, or single shingles, or strip shingles which consist of a plurality of single shingles made into one strip as is well known in the trade.

I claim:

15 A strip of composition roofing material comprising feltsaturated with waterproofing material, coated with plastic bituminous material and having a surface ofwear-resisting material extending over a portion of the top surface of said strip, thus forming a selvage edge thereon substantially parallel to one edge of said strip and a rib of bituminous material formed on said selvage edge substantially parallel to said edge of said strip.

In testimony whereof I aflix my signature.

I MAURICE L. CATON. 

